I have to admit, stacker 2 helped me lose around 70 pounds over a period of 1 1/2 years, this was great. However, I have been fighting to stop taking the Stacker. Rehab, counsiling, etc., once the medication is stopped, withdrawl symptoms can be horrible. Just a bit of advice, 10 lbs in 2 days is not a possible loss for the human body, unless the weight is sweat off, reduced by a water pill or other medication is used. I deal in forensic and anatomy science. It is a nice thought to lose that much weight in 2 days but it's just not possible. Stacker 2 does work through, I can't dispute that.